title: MRI-compatible ultrasound heating system with ring-shaped phased arrays for breast tumor thermal therapy.
abstract: Therapeutic ultrasound transducers can carry out precise and efficient power deposition for tumor thermal therapy under the guidance of magnetic resonance imaging. For a better heating, organ-specific ultrasound transducers with precision location control system should be developed for tumors located at various organs. It is feasible to perform a better heating for breast tumor thermal therapy with a ring-shaped ultrasound phased-array transducer. In this study, we developed ring-shaped phased-array ultrasound transducers with 1.0 and 2.5 MHz and a precision location control system to drive the transducers to the desired location to sonicate the designated region. Both thermo-sensitive hydrogel phantom and ex vivo fresh pork were used to evaluate the heating performance of the transducers. The results showed that the ring-shaped phased array ultrasound transducers were very promising for breast tumor heating with the variation of heating patterns and without overheating the ribs.
authors.forename: Hung-Nien
authors.initials: HN
authors.lastname: Chen
authors.forename: Guan-Ming
authors.initials: GM
authors.lastname: Chen
authors.forename: Bo-Sian
authors.initials: BS
authors.lastname: Lin
authors.forename: Pi-Hsien
authors.initials: PH
authors.lastname: Lien
authors.forename: Yung-Yaw
authors.initials: YY
authors.lastname: Chen
authors.forename: Gin-Shin
authors.initials: GS
authors.lastname: Chen
authors.forename: Win-Li
authors.initials: WL
authors.lastname: Lin
mesh_terms: D000818:Animals; D001943:Breast Neoplasms / Q000628:therapy*; D005260:Female; D019220:High-Energy Shock Waves; D006801:Humans; D006979:Hyperthermia, Induced; D008279:Magnetic Resonance Imaging; D019047:Phantoms, Imaging; D013696:Temperature; D014464:Ultrasonic Therapy / Q000295:instrumentation / Q000379:methods*